Sigma (1.8 - 1.16) 90%

Vivid, opaque, water-based, and non-toxic pigment ink.

Produces a 1.8 mm to 2.5 mm broad line, which varies depending on writing pressure. Sigma (1.8 - 1.16)

Waterproof and lightfast; the ink is removable on nonporous surfaces (like glass) but permanent on porous surfaces (like paper). Vivid, opaque, water-based, and non-toxic pigment ink